JPH0746851Y2 - Medical gas supply device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for supplying a medical gas filled in a pressure vessel, such as oxygen, laughing gas or nitrogen,
More specifically, the present invention relates to a medical gas supply device capable of detecting the open / closed state of a container valve.

2. Description of the Related Art In a hospital or the like, medical gas needs to be configured so as to be able to be continuously supplied, otherwise there is a risk of life loss. Therefore, a plurality of pressure vessel groups filled with medical gas are provided, these pressure vessel groups are switched, and the gas is continuously supplied in a batch type. The pressure vessel group used at this time and having a small remaining amount is replaced with a new pressure vessel group. When a new pressure vessel group is replaced and installed, if the operator mistakenly keeps the vessel valve closed, the remaining amount of the pressure vessel group in use will decrease, and the new pressure vessel group will be reduced. Even if an attempt is made to supply gas from the group, the gas cannot be supplied from the new pressure vessel group, resulting in the supply of gas being stopped.

Problem to be Solved by the Invention An object of the present invention is to provide a medical gas supply device capable of preventing erroneous operation of a container valve.

Means for Solving the Problems The present invention provides (a) a pressure container 1 filled with medical gas, and (b) a first connection provided in the pressure container 1, which is opened and closed by a knob 107 and has an outlet 82. A container valve 3 in which an external thread is engraved on the cylinder 84, and (c) a pipe joint 83, a bag nut 85 which is inserted through the second connection cylinder 86, is detachably attached to the external thread of the container valve 3. A pipe joint 83 that is screwed to make one end of the second connecting cylinder 86 airtightly contact the end of the first connecting cylinder 84 via the seal member 87; and (d) the open / closed state detecting means 81, The second connection tube 86 has a screw hole into which an external screw is formed, which is formed at the other end of the connection tube 86, a connection hole 91a connected to the second connection tube 86, and a cylinder chamber 92 connected to the connection hole 91a. A main body 88, a piston 94 housed in the cylinder chamber 92, and a displacement rod whose one end is fixed to the piston 94 and extends along the axis of the cylinder chamber 92. 97, a permanent magnet piece 101 fixed to the other end of the displacement rod 97, a magnetic detection element 102 for detecting the proximity / separation of the permanent magnet piece 101, and a spring force directed to the piston 94 toward the connection hole 91a. Give and container valve 3
The pressure of the medical gas from the connection hole 91a to the piston 9
When 4 is displaced against its spring force and the permanent magnet piece 101 approaches the magnetic detection element 102 and no medical gas is supplied to the connection hole 91a, the permanent magnet piece 101 separates from the magnetic detection element 102. As described above, a spring 95 that displaces the piston 94 with a spring force, and an alarm unit that generates an alarm when it detects that the magnetic detection element 102 is separated from the permanent magnet 101 in response to the output of the magnetic detection element 102. An open / closed state detecting means 81 having 104, 105, 106, (e) a conduit 5 for supplying medical gas, and (f) the conduit 5 is connected to one end, and an external thread formed at the other end is provided with the main body 88. Third connecting cylinder 89 which is screwed into another screw hole of the first connecting cylinder 86 and is connected to the connecting hole 91a.
(G) In the check valve 4 provided in the third connecting cylinder 89, the valve body 91 is provided with the spring 92a, and the valve seat 9 on the main body 88 side is provided.
The medical gas supply device is characterized in that a spring force is applied to 0, and a check valve 4 for guiding the medical gas from the container valve 3 to the pipe line 5 is included.

Operation According to the present invention, the container valve 3 is detachably screwed to the first connecting cylinder 84 of the container valve 3 provided in the pressure container 1 filled with medical gas, with the bag nut 85 of the pipe joint 83 being detachably screwed. When closed, the spring 95 of the open / closed state detection means 81 moves the piston 94
The permanent magnet piece 101 is displaced so as to be separated from the magnetic detection element 102, and therefore the magnetic detection element 102 detects that the permanent magnet piece 101 is separated from the magnetic detection element 102, As a result, the alarm means 104, 105, 106 generate an alarm, whereby it can be known that the container valve 3 remains closed.

Then, when the knob 107 of the container valve 3 is operated and opened, the piston 94 resists the spring force of the spring 95 due to the pressure of the medical gas in the pressure container 1, and the permanent magnet piece 101 approaches the magnetic detection element 102. When the magnetic detecting element 102 detects the displacement, the alarm means 104, 105, 106 stop generating the alarm. In this way, if the container valve 3 is kept closed, the alarm is still generated as described above, so that it is possible to prevent an erroneous operation of forgetting to open the container valve 3.

The medical gas from the container valve 3 causes the valve body 91 of the check valve 4 to spring 92.
The medical gas is supplied to the conduit 5 while being separated from the valve seat 90 against the spring force of a.

When the pressure of the medical gas in the pressure vessel 1 decreases due to the use of the medical gas, the spring force of the spring 95 of the opening / closing state detecting means 81 causes the piston 94 to separate the permanent magnet piece 101 from the magnetic detecting element 102. It is displaced, which is detected by the magnetic detection element 102 and an alarm is issued by the alarm means 104, 105, 106.

When the pressure decreases due to the use of the medical gas in the pressure vessel 1, the bag nut 85 of the pipe joint 83 is removed from the first connecting cylinder 84 of the vessel valve 3 in order to replace the pressure vessel 1. At this time, the high-pressure medical gas in the conduit 5 causes the valve body 91 to be seated on the valve seat 90 together with the spring force of the spring 92a of the check valve 4 to close the valve. Therefore, the medical gas in the pipeline 5 is not released into the atmosphere, and there is no possibility that air will enter the pipeline 5, and therefore, the invasion of air should be suppressed as much as possible when the pressure vessel 1 is replaced. You can

Embodiment FIG. 1 is a sectional view of an embodiment of the present invention. The open / close state detecting device 80 according to the present invention is basically a pressure detecting means.
81 and the check valve 4 provided on the downstream side of the pressure detecting means 81. The open / closed state detecting means 81 is connected to a pipe joint 83 forming an outlet 82 of the container valve 3.

FIG. 2 is a piping system diagram of the medical gas supply device showing a state in which the open / close state detecting devices 80a, 80b according to the present invention are attached to the pressure vessels 1a, 1b. The pressure vessels 1a and 1b are filled with oxygen as medical gas, laughing gas, nitrogen, or the like. The components corresponding to these pressure vessels 1a and 1b are shown with subscripts a and b, and such subscripts are omitted as a whole. The gas from the check valve 4 is guided from the conduit 5 via the supply conduit 6.

The outlet 82 of the container valve 3 is formed in a connecting tube 84, and an external thread is engraved on the connecting tube 84. The external thread is attached to the external thread.
The bag's nut 85 is screwed. As a result, the end of the connecting tube 86 of the open / closed state detecting device 80 is connected to the connecting tube 84 via the seal member 87.
Is airtightly and detachably connected to the end of the. Connection tube 86
Is screwed onto the main body 88 of the pressure detecting means 81. A connection tube 89 is screwed onto the main body 88. The conduit 5 is connected to the connection cylinder 89. The outer screw engraved on the end of the connection tube 89 is
The valve seat 90 made of a material such as a disc-shaped synthetic resin is fixed in this state by being screwed into the screw hole of 88. This valve seat 90 has
A spherical valve body 91 made of a material such as metal is biased by a spring 92a. In this way, the check valve 4 is constituted by the valve seat 90, the valve body 91 and the spring 92a.

In the pressure detecting means 81, the main body 88 is formed with a connection hole 91a connected to the connection tubes 86 and 89, and a cylinder chamber 92 is formed in connection with the connection hole 91a. An annular seal member 93 is attached to the piston 94 in the cylinder chamber 92, and the piston 94 is displaceable in the axial direction of the cylinder chamber 92 (vertical direction in FIG. 1). The spring 95 biases the piston 94 toward the connection hole 91a. A displacement rod 97 is fixed to the piston 94. The displacement rod 97 is displaceable in the axial direction of the support cylinder 99, which is screwed to the main body 88 via the seal member 98, sealed by the seal member 100.

The permanent magnet piece 101 is fixed to the support rod 97.

The lead switch 102 is fixed to the support tube 99, and the cover 103
Covered by. The reed switch 102 conducts when the permanent magnet pieces 101 are separated from each other as shown in FIG. 1, and the permanent magnet pieces 101 are forced by the spring force of the spring 95 by the pressure of the gas from the container valve 3. It has a configuration to cut off when approaching as shown by a virtual line against. Reed switch 10
The output from 2 is provided to the control circuit 104. The control circuit 104 controls the alarm lamp 105 and the buzzer 106.

The container valve 3 has a knob 107, and the knob 107 can be opened and closed by rotating the knob 107. When the container valve 3 is closed, the pressure at its outlet 82 is low, so that the piston 94 and the support rod 97 are displaced toward the connection hole 91 by the spring force of the spring 95 as shown in FIG. ing. Therefore, the permanent magnet piece 101 is separated from the reed switch 102. Therefore, the control circuit 104 turns on the alarm lamp 105, and the buzzer 106 emits an alarm sound, so that an alarm can be issued.

When the knob 107 of the container valve 3 is rotated to open the valve, the pressure at the outlet 82 rises, and the gas from the pressure container 1 via the container valve 8 is supplied from the check valve 4 to the conduit 5. It Due to the pressure of this gas, the piston 94, and hence the support rod 97, is displaced against the spring force of the spring 95 as shown by the phantom line in the upper part of FIG. 1, and the permanent magnet piece 101 is reed switch 102. The reed switch 102 closes in proximity to. Therefore, the control circuit 104 turns off the alarm lamp 105 and stops ringing of the buzzer 106 in response to the opening of the container valve 3.

As another embodiment of the present invention, instead of the combination of the permanent magnet piece 101 and the reed switch 102, the displacement of the piston 94 may be detected by other configurations. To further describe the configuration shown in FIGS. 1 and 2, in the pipe joint 83, the bag nut 85 is inserted through the connecting cylinder 86, and the container valve 3
It is screwed into an external screw engraved on the connection tube 84, and thus one end of the connection tube 86 airtightly contacts the end of the connection tube 84 via the seal member 87.

The external screw formed on the other end of the connection tube 86 is screwed into the screw hole of the main body 88 of the open / closed state detecting means 81. One end of the displacement rod 97 is fixed to the piston 94, and the displacement rod 97 extends vertically along the axis of the cylinder chamber 92 in FIG. Displacement rod 97
A permanent magnet piece 101 is fixed to the other end of the, and the approach / separation of the permanent magnet piece 101 is detected by a lead switch 102 which is a magnetic detection element. Spring 95, piston 9
A spring force is applied to 4 toward the connection hole 91a.

The conduit 5 is connected to one end of the connecting tube 89. Connection tube 89
An external thread is formed at the other end of the main body 88 and is screwed into another screw hole of the main body 88, whereby the connecting tube 89 is connected to the connecting tube 86 and the connecting hole 91a.

Effect of the Invention According to the present invention, the open / closed state detecting means 81 is provided unless the container valve 3 provided in the pressure container 1 filled with medical gas is opened.
The spring 95 displaces the piston 94 by the spring force so that the permanent magnet piece 101 is separated from the magnetic detection element 102, and accordingly, alarms are issued from the alarm means 104, 105, 106. Therefore, an erroneous operation of keeping the container valve 3 closed can be prevented.

In particular, according to the present invention, the medical gas via the conduit 5 is used, which necessitates the replacement of the pressure vessel 1 and the fitting 83
Even when the work of connecting to the container valve 3 that is in the closed state of the new pressure container 1 is frequently performed, an alarm is generated if the container valve 3 remains closed as described above. Therefore, the container valve 3 is reliably prevented from being closed.

Furthermore, according to the present invention, when the medical gas in the pressure vessel 1 is used and its pressure drops, an alarm means is also provided.
An alarm is generated by 104, 105 and 106, so that it is possible to easily know that the pressure vessel 1 should be replaced.

Further, according to the present invention, when the pipe joint 83 is removed from the container valve 3, the medical gas in the pipe line 5 is not released to the atmosphere by the action of the check valve 4, and the contamination of the atmosphere is prevented. The excellent effect that it can be minimized is also achieved.

Further, according to the present invention, in the open / closed state detecting means 81, the displacement bar 97 which is a movable portion is provided with the permanent magnet piece 101, and the proximity / separation of the permanent magnet piece 101 is detected by the magnetic detection element 102. There is also an effect that the configuration can be simplified, and the operation is reliable.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a piping system diagram of a gas supply device equipped with open / closed state detecting devices 80a and 80b. 1a, 1b …… Pressure vessel, 3a, 3b, 3 …… Pressure valve, 4a, 4b, 4 ……
Check valve, 80 …… Open / closed state detection device, 81 …… Pressure detection means, 88 …… Main body, 94 …… Cylinder, 95 …… Spring, 97 ……
Support rod, 99 ... Support tube, 101 ... Permanent magnet piece, 102 ... Reed switch, 104 ... Control circuit, 105 ... Alarm lamp,
106 …… Buzzer

Claims (1)

[Scope of utility model registration request] 1. A pressure vessel 1 filled with (a) medical gas.
(B) The container valve 3 provided in the pressure vessel 1 and opened / closed by the knob 107, and the first connecting cylinder 84 having the outlet 82 is engraved with an external screw, and (c) the pipe joint 83. The bag nut 85, which is inserted through the second connecting cylinder 86, is detachably screwed onto the outer screw of the container valve 3 so that one end of the second connecting cylinder 86 is first connected via the seal member 87. A pipe joint 83 that comes into air-tight contact with the end of the cylinder 84, and (d) an open / closed state detecting means 81, which has a screw hole into which an external screw formed at the other end of the second connecting cylinder 86 is screwed. A main body 88 having a connection hole 91a connected to the second connection cylinder 86 and further having a cylinder chamber 92 connected to the connection hole 91a; a piston 94 housed in the cylinder chamber 92; The displacement bar 97 that is fixed and extends along the axis of the cylinder chamber 92, the permanent magnet piece 101 that is fixed to the other end of the displacement bar 97, and the permanent magnet piece 101 are close to each other. A magnetic sensor 102 for detecting that the separated, giving a spring force toward the connection hole 91a in the piston 94, the container valve 3
The pressure of the medical gas from the connection hole 91a to the piston 9
When 4 is displaced against its spring force and the permanent magnet piece 101 approaches the magnetic detection element 102 and no medical gas is supplied to the connection hole 91a, the permanent magnet piece 101 separates from the magnetic detection element 102. When it is detected that the magnetic detection element 102 is separated from the permanent magnet piece 101 in response to the output of the spring 95 and the magnetic detection element 102, which displaces the piston 94 with a spring force,
The open / closed state detecting means 81 having alarm means 104, 105, 106 for issuing an alarm, (e) the pipeline 5 for supplying medical gas, and (f) the pipeline 5 are connected to one end and formed at the other end. A third connecting cylinder 89 in which an outer screw is screwed into another screw hole of the main body 88 and is connected to the first connecting cylinder 86 and the connecting hole 91a.
(G) In the check valve 4 provided in the third connecting cylinder 89, the valve body 91 is provided with the spring 92a, and the valve seat 9 on the main body 88 side is provided.
A medical gas supply device comprising a check valve 4 to which a spring force is applied to 0 and which guides the medical gas from the container valve 3 to the conduit 5.